What is gastroenteritis?
A person with gastroenteritis has inflammation of the stomach and intestines, caused by an infection. Most cases of gastroenteritis are caused by viruses. Some bacteria may also cause a more severe form of bacterial gastroenteritis. Well known viral causes include Norwalk virus infection and rotavirus infection. Well known bacterial causes for gastroenteritis include salmonella enteritis, shigella infection, and toxigenic E coli. Dehydration from vomiting and diarrhea is the most common complication of gastroenteritis.

What are the symptoms of gastroenteritis?
Common symptoms of gastroenteritis include cramping abdominal pain, fever, nausea and vomiting. Diarrhea is the most common symptom and stools may be watery, bloody, or contain yellow or green mucus.

How does the doctor treat gastroenteritis?
Treatment for most forms of viral gastroenteritis is largely supportive as antibiotics provide no benefit. General treatment includes clear liquid diet, hydration, and fever control. Bacterial gastroenteritis treatment varies based on the species of bacteria. Some may benefit from intravenous fluids and antibiotics.